Skiving-machine.



A. W. EATON & 0. PHASE.

SEWING MACHINE. APPLICATION FILED JAN.18,1909.

Patented Jan. 6, 1914.

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A. W. EATON & G. PEASB.

SKIVING MACHINE.

APPLICATION FILED JAN.18,1909.

1,083,274, 4 Patented Jan. 6, 1914.-

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COLUMBIA PLANOORAPH KID-.WASHINGTON, D. 0.

UNITED STATES PATENT OFFICE.

ARTHUR W. EATON, 0F WENHAM, AND CHARLES PEASE, 0F SALEM, MASSACHUSETTS,

ASSIGNORS T0 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

SKIVING-MACHINE.

To all whom it may concern.

Be it known that we, ARTHUR W. EATON and CHARLES PEASE, citizen of the United States, and residents of Wenham and Salem, in the county of Essex and Commonwealth of Massachusetts, respectively, have invented certain Improvements in Skiving-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to machines for producing a bevel on stock and particularly to a machine for producing bevels of c011- siderable length.

In order to produce a perfect bevel so that the thickness of the beveled portion decreases uniformly from the thickness of the stock to the desired thickness, it is necessary that the cutting edge of the knife be in line with a plane passing through the axis of the feed roll and the element along which said roll engages the stock. For the production of bevels the length of which does not exceed three quarters of an inch or thereabout, the ordinary machines now in general factory use can be made to fulfil these conditions approximately. In some arts, however, for example in the manufacture of belts, it is necessary to produce bevels of six inches or more in length, and it is quite impracticable to increase the size of the rotary disk knife to enable it to perform this sort of work. Not only should the knife be positioned relative to the feed roll, as indicated above, but said knife should traverse the stock in such a manner as to produce a drawing out. Hitherto this result has been attain-ed with some degree of success by the use of machines employing band knives, but such machines have grave disadvantages. These disadvantages are due among other things to the necessity of employing large rolls over which the knife is passed and of applying great power to keep the band taut. It is found in machines employing this form of knife that said knife must be passed over large rolls so as to be bent in a curve having a large radius; the life of the knife being otherwise very short since the metal soon crystallizes and the knife breaks. For these and other reasons machines employ- Speeification of Letters Patent.

Application filed January 18, 1909.

Patented J an. 6,1914. Serial No. 472,989.

ing band knives are large and heavy, whereby their cost and the floor space occupied by them is greatly increased.

One object of this invention is to avoid these disadvantages and at the same time produce a more efficient machine. To this end a sectional knife may be provided, and these sections or blades may be fastened to an endless flexible or jointed member whereby there is produced a flexible or articulated knife which is capable of conforming to the outlines of curves of small radii and which may therefore be driven by rotatable drivlng members of small diameter. In the illustrated embodiment of the invention the sections or blades are fixed to the links of an endless chain and form therewith what may be termed a chain knife; and this chain knife, instead of being mounted as is the ordinary band knife, is driven by sprockets in a path the plane of which coincides with the plane of the knife. With this construction all the driving-strain falls upon the chain and no bending of the sections of the knife is necessary.

Another object of this invention relates to the provision of means for adjusting the feed roll to bring the roll into proper p0 sition so that a straight bevel will be produ-ced by the knife, to provide for different thicknesses of stock, and to determine the angle of the skive. This means may conveniently comprise a roll-carrying member slidably and rotatably mounted in a support, said support in turn being vertically movable, together with means for adjusting said member and support. Preferably this roll carrying member also carries a gage so that the gage partakes of all the movements of the feed roll.

Another object of this invention relates to the provision of a yieldable feed disk which is adjustable along the cutting edge of the knife and which may be detached from the machine without disturbing any of the remaining parts. In the illustrated embodiment this is provided for by slidably mounting one end of the shaft which drives the disk in a rotatable sleeve, the bearing for the other end of said shaft being carried by a slidable member which is held in adjusted position on a guide. With this construction the slidable member may if desired be moved off from the guide, and the driv ing shaft for the feed disk withdrawn from its sleeve.

Under certain circumstances, for example, when a curved edge is being skived, it is desirable that the rotation of the feed disk shall be retarded; and a further object of this invention is to permit such retardation when desired. This may conveniently be accomplished by providing a frictional drive for said disk, and in the illustrated embodiment the sleeve in which the driving shaft for the disk is mounted is held in engagement With its driving gear by yielding means.

It, is advantageous in machines of this class to be able to remove the knife and its mechanism without further dismantling the -machine; and this may conveniently be accomplished by providing a sectional driving shaft and by mounting one section of said shaft together with the knife and its associated parts on a single casting which is detachably secured to the frame of the machine.

These and other features of the invention including certain details of construction and combinations of parts will be explained in connection with the following description of a machine and will be more definitely pointed out in the claims.

Referring now to the accompanying drawings: Figure 1 is a front elevation of a machine embodying this invention, the upper plate of the knife case being broken away to show the chain knife and one driving sprocket; Fig. 2 is an end elevation,the support for the roll being broken away to show the rotatable and slidable member which carries the bearing for the feed roll shaft; Fig. 3 is a detail perspective showing a piece of stock being fed to the knife, andshowing also the means for adjusting the roll; Fig. 4 is a detail showing the friction drive for the shaft which actuates the feed disk. A casting 1 provided with arms 3, 5 and 7 serves as a base upon which the rest of the machine is mounted. The knife used with this machine comprises a plurality of blades 9 mounted in the links of an endless chain which is driven by. sprockets fast to the lower ends of shafts 11, said chain and one of the sprockets being shown in Fig. 1. The knife, it will be observed, travels in an approximately elliptical path, or more properly in the path of a flattened ellipse, said path having curved portions where the knife engages the sprockets and straight portions between said sprockets. It will also be observed that the knife lies wholly in the plane of said path. Inasmuch, however, as the specific construction of the knife and of the driving sprockets forms no part of the present invention no further description of them will be given. This knife is held between two plates 13 and 15 which are. held together by screws 17. Integral with the top plate 13 are the tubular castings 19 which support the bearings for the shafts 11, said shafts carrying on their upper ends bevel gears 21, the bearing for the left hand shaft 11 as seen in Fig. 1 being held in position by a nut 23 and being adjustable by set screw 25 so as to tighten the chain knife about the sprockets.

In order to drive the sprockets and thereby the chain knife a' pair of bevel gears 29 and 31 which mesh with the bevel gears 21 on the sprocket shafts are mounted on the main shaft 33, the gear 31 being held in adjusted position on the shaft by a set screw 32 so that said gear may be moved longitudinally if desired to. allow for transverse movement of the shaft 11 by the set screw 25. The shaft 33 is broken at 35, and the two parts have squared ends which are held in a coupling member 37. The bearings 39 which carry the outer portion of said shaft are integral with the plate 13; and all the parts above described with the exception of the inner or right hand portion ofthe shaft 33 (as seen in Fig. 1) are detachably supported upon the arm 5 of the main casting by means of bolts 27 Which pass through said arm and are threaded into an upwardly extending flange 41 integral with the plate 13. See Fig. 2. To this casting, composed of the plate 13, the tubular members 19, the bearings 39 and the flange 41, a guide 43 is attached by means of screws 45 which engage respectively a projection 47 on the flange 41 and the upper part of the right hand tubular member 19 as seen in Fig. 1. Upon this guide is mounted a slide 49 which is split and may be held in adjusted position on said guide by a pinch-bolt 51, said guide carrying a bearing 53 for a shaft 55. Adjustable about the bearing of this shaft and held in adjusted position by a set screw 90 is a bracket carrying the bearings 59 of the spindle 62 of the feed disk. This spindle is rotated by means of bevel ears 61 and 63, the spindle 62' of the fee ing disk being squared Where it extends through a corre-- 'spondingly shaped passage in the gear 61. A spring 64, the tension of which is regulated by an adjustable collar 66, presses the disk against the stock.

The shaft 55 is slidably mounted in a rotatable sleeve 65 having a bearing in arm 7 and is held to rotate. with said sleeve by a key which engages a key way 67 in said shaft. Said sleeve 65 has a friction flange 72 which is pressed into engagement with a gear 69 rotatably mounted on said sleeve by means of a spring 78, one end of which bears on a washer while the opposite end bears against a collar 82 adjustable along said sleeve and held in position by a set screw 84. By this construction means is provided whereby the feed disk 57 may be permitted to slip, an attribute which is sometimes desirable, as for instance when a curved edge is being skived which the operator finds difficulty in guiding at the normal speed of the feed disk. The gear 69 1s driven by mechanism which will presently be described. Attention is here directed to the fact that the feed disk may be adjusted along the guide 43 after the bolt 51 has been loosened without interfering with its rotation or may be removed from the machine by loosening the collar at the right hand end of the bearing 53, as shown in Fig. 1, loosening the pinch-bolt 51 and moving the slide 49 to the left (Fig. 1) without disturbing the other parts, and that by unscrewing the bolts 27, the knife, the feed disk and their associated parts may be removed, separation of the parts of the shaft 33 taking place at the coupling 37.

In order to feed stock to the knife a feed roll is provided having three adjustments an adjustment to accommodate stock of different thicknesses, an angular adjustment to regulate the angle of the bevel, and an adjustment to and from the knife to properly position the roll. To allow for these different movements the shaft 71 having a bearing in the main casting '1 is connected with the roll shaft 73 by means of a universal joint herein shown as of the Hooke type, the parts 75 and 77 of which are connected by a rod 79 and cylinder 81 a slot 83 being formed in said cylinder through which extends a pin 85 fast to said rod. With this construct-ion it is evident that the roll shaft 73 may be moved bodily in any direction within certain limits and that the consequent increase in distance between the end of the roll shaft 73 and the adjacent end of the shaft 71 will be taken care of by the sliding connection described above.

The roll shaft 73 is rotatably mounted in a sleeve 851 which is fast to a sliding member 89 said member being rotatable and also horizontally movable in the support 97. A worm 91 capable of rotation but held against longitudinal movement is mounted in the support 97, said worm meshing with a gear 87 cut in the rotatable member 89 and being provided with a squared wrench hold 93. By turning the wrench hold the gear 87 is rotated and the bearing 851 of the roll shaft thereby angularly adjusted about the axis of said gear. Movement to and from the knife in a horizontal plane is accomplished by means of a screw bolt 95 capable of rotation but not of longitudinal movement in the support 97, the member 89, as above stated, being slidably mounted in said support. Movement of the roll to accommodate stock of different thicknesses is provided for by slidably mounting the support 97 on guides 99, herein shown as upright rods held rigidly to the main casting 1 by flanges 101 and nuts 103. To provide for adjustment of said support 97 a screw bolt 105 capable of rotation but not of longitudinal movement therein is threaded into a socket in the main casting 1, said bolt being provided with a wrench hold 107. A gage of ordinary construction which is held in adjusted position by means of a thumb screw 108 and has a spring finger 110 governed by a set screw 112 and a lock nut 114 is mounted on an arm 116 which is integral with the sleeve bearing 851 of the shaft 73 of the roll 118. l/Vith this construction and arrangement it is evident that the gage partakes of all the movements of the roll. By reference to Figs. 1 and 2 it will be evident that the plane of the path of the knife is inclined to the plane of angular movement of the feed roll, this arrangement having been found to facilitate the passage of stock between the knife and roll.

Rotation of the main shaft 33, the shaft 55 for driving the feed disk and the shaft 71 is accomplished as follows: An upright shaft 109 mounted in bearings in the main casting 1 carries two oppositely threaded worms 111 and 113 which mesh respectively with gear 69, the mounting of which has been described, and with the gear 115 carried by the shaft 71. Fast to this upright shaft is a pulley 117, a belt 119 passing around this pulley, over two idle pulleys 121 and around a pulley 123 fast on a sleeve 125 which is keyed to the shaft 33. In order to drive the main shaft 33 a friction clutch of ordinary type is provided said clutch comprising a driven element 127 fast to the sleeve 125 which is keyed to the shaft and a driving element 129 fast to a sleeve 131 which is loose on said shaft. A pulley 133 which may be connected with any suitable source of power is formed on said element 129. In order to throw in the clutch a loose collar 135 is provided with pins 137 which are engaged by a forked cam 139 pivoted at 141 to the arm 3 of the main casting and operated by a rod 143 said rod extending downward to a treadle or other suitable operating device (not shown) and being held in its uppermost position by a spring 145 which engages a collar 147 at one end and at the other a fixed abutment which may be the table upon which the machine is mounted. Between the collar 135 on the main shaft and the element 131 an antifriction washer 149 is interposed.

Before proceeding to describe the operation of the device it should be stated that the length of the feed roll 118 used depends upon the length of the skive desired, and

that interchangeable rolls of different lengths are therefore provided. A roll of proper length having been fastened to the roll shaft 73 the operation of the device is as follows: The rod 143 having been depressed, the clutch 127, 129' is thereby thrown in. The shaft 33 by means of the bevel gears 29, 81 and 21 rotates the shafts 11 and thereby the sprockets which operate the chain knife, while the upright shaft 109. by means of the gearing described above rotates the feed disk and the feed roll as shown by the arrows in Fig. 3. The gage is adjusted by means of the thumb screw 108, the set screw 112 and the lock nut 114. By means of the wrench hold 95 the shaft 73 of the feed roll ismoved into a vertical plane passing through the edge of the knife; the wrench hold 107 serves to adjust the roll to provide for the thickness of the stock, while the angle of the skive is determined by turning the worm 91. The various adjustments having thus been completed and the feed disk 57 adjusted to proper position along the guide 43, the stock 201 is presented to the roll and feed disk, as shown in Fig. 3, and fed thereby to the knife, the stock passing beneath the knife while the piece removed from said stock passes up over the plate 13.

Although the invention has been described in connection with a particular machine it should be understood that the machine is illustrative only and that nothing herein contained is to be construed as limiting the invention in the scope of its application to the particular machine shown and described.

Having thus described the invention what is claimed and desired to be secured by Letters Patent is 1. A machine for producing an extended bevel upon a piece of stock having, in combination, a feed roll, an articulated knife located wholly above the roll, means for causing said knife to travel in an approximately elliptical path, and means for adjusting said roll angularly.

2. A machine for producing an extended bevel upon a piece of stock having, in combination, a feed roll, an articulated knife located wholly above the roll, means for causing said knife to travel in an approximately elliptical path, and means for adjusting said roll angularly, said adjusting means comprising a bearing provided with a stem having teeth cut thereon and an adjusting screw engaging said teeth.

3. A machine for producing an extended bevel upon a piece of stock having, in combination, an articulated knife, means for actuating said knife, and means for feeding stock thereto, said feeding means comprising a feed roll, a feed roll shaft, a bearing in which said shaft is mounted, said bearing being provided with a toothed stem, a

socket in which said stem is received, means cooperating with said teeth to adjust said stem angularly, and means for adjusting said stem longitudinally.

4-. A machine for producing an extended bevel upon a piece of stock having, in combination, a feed roll, an articulated knife located wholly above the roll, means for causing said knife to travel in an approximately elliptical path, a feed disk, and

means whereby said disk may be adjusted 6. A machine of the class described hav ing, in combination, a knife, a feed roll, a feed disk, and actuating mechanism for said knife, roll and disk, said disk being capable of adjustment longitudinally of the roll.

7. A machine of the class described having, in combination, a knife, a feed roll, means for actuating said knife and roll, a feed disk and means whereby said disk may be adjusted angularly in a direction at right angles to the axis of said feed roll.

8. A machine of the class described having, in combination, a knife, a feed roll, means for actuating said knife and roll, a feed disk, means for actuating said disk, and means permitting angular adjustment of said disk.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ARTHUR W. EATON. CHARLES PEASE.

Witnesses FRED lV. GUIBoRn, ARTHUR L. RUssELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

